1 definition by diddlegirl69

Flatheaded

otherwise known as; to be a Flathead. basically meaning slutty, jerky, or diddlerish.

Girl #1: so..me and adam hooked up today..
Girl #2: are you guys dating?
Girl #1: no.
Girl #2: *gasp* that's so Flatheaded of you!

by diddlegirl69 February 18, 2010